This topic describes the causes why a Resource Orchestration Service (ROS) stack fails to be created.
Stacks that you create must have unique names.
Invalid name format
The name of a stack can contain only letters and digits. The name cannot start with a digit.
Resource creation failure
If a resource in a stack fails to be created, the stack also fails to be created. For example, if an Elastic Compute Service (ECS) resource in a stack fails to be created due to insufficient memory in a specified region, the stack also fails to be created.
Quantity limit reached
You can create up to 200 stacks in ROS. For more information, see Limits.